www.eloquentlogic.com
eloquent logic eloquent logic

work2.gif (529 bytes)








Legend

W

 = work

F

 = force

d

 = distance

KE

 = kinetic energy

PE

 = potential energy

v

 = velocity

a

 = acceleration

h

 = height
the higher he is, higher the PE
這位爬山者爬得越高，引力勢能便越大•

引力勢能

當這個人向上爬時，他出的力使他做功•而當他站在梯子上不動時，有引力勢能•

 Person climbing a ladder
PE = Fg h

假如他有質量 m:
PE = mg h = mg (hf-hi)

當引力勢能變時，功便會產生:

Wnet = PE = mg (hf-hi)

於是，在引力下，一物體 m 由高度 h 跌下，它所作的功等於:

PE = mgh

Previous Lesson

 Potential Energy

Mechanical Energy

 Next Lesson

 

created by Will Kuo and Stan Watterson
thinkquest participants  team 25844
©1999 Eloquent Logic. All rights reserved.